JPS5829566Y2 - Clamp blade for insulated wires - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a clamp blade for an insulated wire that bites into the insulation of the insulated wire and electrically contacts the conductor.

This type of clamp blade is used for branch connections of overhead power distribution lines and for lightning protection purposes.

The clamp blade of the prior art consists of a flat plate having a large number of protruding injection teeth on the inner surface (Japanese Patent Publication No. 52-35116).
issue).

However, even if such a lamp blade bites into the insulation of an insulated wire with a roughly circular cross section, the cutting edge only makes a circumscribed contact with the conductor, resulting in insufficient electrical contact. This has the disadvantage that electrical non-contact is promoted.

An object of the present invention is to provide a clamp blade for an insulated wire that can effectively make electrical contact with a conductor regardless of the twist of the conductor of the insulated wire.

Embodiments of the present invention will be described in detail with reference to the drawings. Figures 1 and 2 show a clamp blade 1 for insulated wires according to the present invention.
0, and this clamp blade 1o consists of a pair of blade members 16 and 16' attached to a pair of clamp members 14 and 14' for clamping an insulated wire 12.

These blade members 16 , 16 ′ have substrates 18 , 18 ′ of a predetermined length along the axis of the insulated wire 12 and a plurality of cutting edges 20 provided at intervals in the axial direction of the insulated wire 12 .
It consists of 20'.

As shown in FIG. 3, the cutting edge 20, 20' has an inclination that intersects with the twisting direction a of the conductor 12a of the insulated wire, and has a substantially semicircular shape when viewed from the front.

The upper and lower cutting edges 20, 20' are arranged so that their inclinations are in opposite directions, as shown in FIGS. 2 and 3.

In addition, the cutting edge 20.2 is approximately semicircular when viewed from the front.
As shown in FIG. 1, 0' is formed into a substantially semicircular shape having a radius substantially equal to the radius of the conductor when viewed from the front.

Since the cutting edges 20 and 20' are approximately semicircular and approximately equal to the radius of the conductor when viewed from the front, the clamping member 14
, 14', one cutting edge evenly contacts the outer periphery of many conductor strands of the insulated wire 12, increasing the contact area with the conductor strands. Since a plurality of them are provided at intervals, they can be brought into contact with all the conductor wires in the outermost layer, further increasing the contact area with the conductor wires.

Further, since the cutting edges 20 and 20' have an inclination that intersects with the twisting direction of the conductor strands, they can reliably contact many conductor strands within a short distance.

Therefore, the cutting edge effectively contacts the conductor 20a, and stable current conduction characteristics can be obtained.

According to the present invention, as described above, the cutting edge can effectively contact the conductor of the insulated wire over a large area regardless of the twist of the conductor, and therefore there is a practical advantage that the clamp blade can be miniaturized. .

[Brief explanation of the drawing]

FIG. 1 is a front view of the clamp blade according to the present invention, FIG. 2 is a bottom view of the upper blade member, and FIG. 3 is an enlarged view showing the relationship between the twisting direction of the conductor and the cutting edge. 10... Clamp blade, 12... Insulated wire, 12a.
...Conductor, 14, 14'...Clamp member, 16
, 16'--blade member, 20.20'--blade tip.

Claims (1)

[Scope of utility model registration request] A clamping blade for an insulated wire comprising a pair of blade members attached to a pair of clamp members to clamp an insulated wire and biting into the insulation of the insulated wire to electrically contact a conductor, the pair of blades The cutting edge of the member has an inclination that intersects with the twisting direction of the conductor of the insulated wire, and is formed into a substantially semicircular shape that is substantially equal to the radius of the conductor when viewed from the front, and has a plurality of cutting edges spaced apart in the axial direction of the insulated wire. A clamp blade for insulated wires, characterized by being provided with a clamp blade for insulated wires.